Photographic shutter.



I No. 885,612. PATENTED APR. 21, 1908.

' E. L. HALL.

PHOTOGRAPHIG SHUTTER.

APPLICATION FILED 111:0. 29, 1906. RENEWED JUNE 13. 1901.

" 2 SHEETS-SHEET 1.

A 77'0HNEYS PATENTED APR. 21, 1908.

E. L. HALL.

PHOTOGRAPHIG SHUTTER.

APPLICATION FILED DEO.-29, 1905. RENEWED JUNE 18. 1907.

2 SHEETS-SHEET 2.

3 lNVEN r09 ldzl/azdiaizclez'ffall W/TNESSES:

NITED sTArEs P xllENT OFFICE.

EDWARD LANDER HALL, or NEW YORK, N. Y,

PHOTOGRAPHIC SHUTTER.

Specification of Letters Patent.

Patented April 21, 1908.

Application flied December 29, 1905, Serial-No. 293,769. Renewed June 18, 1907. Serial No. 379,607.

4 is a full, c ear, and exact description.

The invention relates to photographic curtain shutters, and the purpose of the inventlonis to provide a construction whereby a single roller only is employed at the top and bottom of the frame, the lower roller being a tension roller and the upper roller being a winding roller, provided with internally-located and exteriorly-o erated means for regulating the extent of t 1e exposure opening in theshutter, said means being also employed to turn the roller jointly with the regulatin mechanism when the curtain is to be wounc up, and enabling the curtain to be adjusted provided with metal binding strips 23, and

without turning the winding mechanism.

The invention consists in the novel construction' and combination 'of the several parts, as will be hereinafter fully set forth and pointed out in the claims.

Reference is to be had to the accompany- I ing drawings forming a part of this specification, in which similar characters of reference indicate corresponding arts in all the figures.

. Figure-1 is a verticai section through the frame of the shutter and likewise through the rollers therein; Fig. 2 is a vertical transverse section taken practically on the line 2-2 of ".Fig. 1; Fig. 3 is an enlarged horizontal section through the central portion of the upper roller, illustrating the manner in which the spacing shaft can be operated independent of t e roller or be connected with the roller to turn the same; Fig. 4 is an enlarged vertical section through the u per roller, the section 'beingtaken practical y onthe line 44 of Fig. 1; Fig. 5 is an enlar ed longitudinal section through the right; and end portion of the upperroller ;-Fig. 6 is a vertical section throug the upper portion, of the frame and a lon 'tudinal section through a sli htly modifie form of the upper roller showing the parts in osition for changing the width of the slit; ig. 7 is an enlarged transverse section through the roller shown in Fig. 6, the section being taken practically on the line 77 of Fig. 6; and Fig. 8 is a vertical section through the upper portion of the frame of the shutter and a longitudinal section through a further modified form'of the upper roller.

bers 12 of the frame and extends beyond them. A spring 14 is coiled around the shaft 13, having one end attached'to a head of the roller, its other end being secured to the shaft as is shown in Fig. 1. A knob 15 is secured preferably to the left-hand end of the shaft 13, having the customary spur to engage with a detent 16 in order to prevent the tension upon the roller B from becoming accidentally relaxed.

0 represents a curtain which consists of the usual two sections 21 and 22, and the opposing inner edges of the sections 21 and 22 are the space between said stri s constitutes an exposure opening 24. The ower edge of the lower section 21 of the curtain is secured to the tensionroller B in any approved manner, and the upper edge of the upper section 22 is attached to an upper tubu ar roller D, held to turn in the frame and which is the only other roller employed. The roller D is tubular and open at each end, and said roller is provided with a fixed central circular.

block 25, having a circular recess 26 in its right-hand face, fprovided with longitudinal inion teeth 26 ormed in its peripheral surace, as is shown in Figs. 3 and 4; and an opening 26 is also provided, which-opening extends from the recess 26 to the left-hand face of the block.

To the right of the'central block 25 two other blocks 27 and 28 are fixed in the roller, and said blocks 27 .and 28 are rovided with openings 27 and 28 in longitudinal alinement with each other and with the recess26, being preferabl of the same diameter as said recess; and to the left of the central block 25 another block 29 is secured in the upper roller D, provided with an opening 29 similarly located to and being of the same diameter as the openingsfin the blocks 27 and 28. r

In connection with the upper roller D, two I spacing or adjusting shafts are employed, adapted to regulate the width of the space 24 between the sections of the curtain. These shafts are located at opposite sides of the center 0f the roller D, the shaft 30 being to the right and the shaft 31 to the left side of said center as is best'illustrated in Fig. 1,

and both of the shafts 30 and31 are tubular. The shaft 30 is journaled at its outer end in the upper portion of the right hand side member 12 of the frame A, and at its inner end is journaled in the o ening 28 in the block 28, and the outer en of the shaft 31 is mounted in the upper portion of the lefthand member 12 of the frame A, its inner end being journaled in the opening 29 of the left-hand block 29, as is shown in Figs. 1 and 3. Each of said shafts is provided near its ouferend within the frame with a reel, and these reels are designated as 32 and 32, and

- the inner flanged portion of each reel constitutes a head for an end of the roller D, as is shown in Fig. 1, ,but these heads turn loosely in the said roller and are provided with peri heral grooves 34, into which a pin 35 exten s, secured to the said roller, so that when the shafts 30 and 31 are'in place in the 7 said roller they cannot be accidentally with.-

drawn.

The reels 32 and 32 practicallydill the spaces between the ends of the roller D and t e opposing side surfaces of -'the frame A. The two curtain sections21 and 22 are connected at their ends by tapes 36, and these tapes as is'shown best m Fig. 1, are attached to the up er curtain section 22 at its bound edge, an are then carried through slots in the bound edge of the lowercur-tain section 21, and the ends of the said tapes are carried up and are secured to the reels,,32 and 32 in any'suitable or approved manner.

The right-hand spacing shaft 30 is provided with a slot 37 .therein adjacent as its central portion but within the said roller; and a s ring 38 is coiled around theshaft at its s otted portion 37 .as is shown in both Figs. 1 and 5. At the inner end of the left-hand spacing shaft 31 .a pinion 39 isformed, which EIDiOD. occu ies a s ace between the central lock 25 an the le t-handblock 29 as is best shown in Fig. 3, and this pinion 39 is tubular.

A contro shaft 40 is loosel passed through the right-hand spacing sha t 30 and at its ri ht-hand end is provided with a knob 40", an this controlling shaft 40 extends out beyond the right-hand side of the frame A of the shutter and through the opening 27 in the block'27 and terminates at its inner end in a pinion '41, which pinion when the controlling shaft 40 is pressed inward enters the recess 26 in the central block 25, the teeth in said recess mes with the teethof the.pin-' ion, thus locking t e controlling shaft to the said center block 25 whereby at such time when the controlliif shaft is turned, the upper roller D will ewise be revolved to wind up the curtain thereon.

A pin 42 is assed through the shaft 40 and throughthes 0t 37 the right-hand spacing shaft 39 as shown in Figs. 1 and 5, and the said pin presses against the inner end of the coile spring 38, the outer, end of which spring is usually made to bear against a washer 43, located at the inner face of the right-hand head of said roller D.

The controlling shaft 40 passes through a casing 43, which is secured at the outer face of the right-hand. side member 12 of the frame A, and this casing has a sight opening 44 therein. A pinion 45 is located on the controlling shaft 40, having sliding movement on said shaft but being compelled to turn therewith, said pinion being preferably provided with a key 46, which enters a roove 47 in the said shaft, as is shown in ig. 5. This pinion 45 meshes with a gear wheel 48 likewise located in the casin 43, and a scale is produced upon the outer ace of this gear wheel, read through the'sight opening 44, so that when the controlling shaft is turned to regulate the width of the exposure 0 nin 24 the gear 48 will be turned and the a juste width in inches and fractions of an inch can be read from the said scale.

It will be observed that the controlling shaft 40 has sliding movement in the righthand spacing shaft 30, and that the spring 38 is compressed when the-said controlling shaft 40 is drawn outward by means of the knob 40" to carry the pinion 41 on the said shaft 40 from looking engagement with the roller; and that just as soon as the shaft 40 is released,

'the spring 38 will act to instantly carry the pinion of the shaft into the toothed recess in the center block 25.

What may be termed a locking shaft 49 is secured at its inner end in the o nin 26 in the center block 25 and this loc g s aft 49 extends the le end of the leftand s acing shaft 31, as is shown in Fi 1, an is provided with a th of, and beyond the outer.

ratchet whee 50 secured to its. outer end, I

which is enga ed by a pawl or detent 51, so that as the roliir is turned to wind u the curtain the ratchet and pawl device prevent the curtain from accidentally unwinding; but when the exposure-is to be made the pawl or detent 51 is carried out of engagement with the ratchet wheel 50 by means of a pneumatic 52, a finger latch or like device, whereupon the tension roller B will act to roll the curtain thereon' and effect an exposure. t a

In connection with the controlling shaft and the s acing shafts a transmitt' shaft 53 is emp oyed, and this latter shaftls journaled above said shafts in the blocks 25, 27 and 29 as is shown inFigs. 1 and 3. This transmitting shaft 53 is provided adjacent to its right-hand end with a pinion 54, which shaft 53 is also revolved, and by means of a 31 is revolved as the pinion 55 meshes with upper an the pinion 39 on the said shaft 31; and as has een stated, when the pinion 41 is out of the recess 26 and the controlling shaft 40 is turned, the right-hand spacing shaft 30 is compelled to turn with it.

Thus it will be observed that a very simple shutter is rovided, having but two rollers an d a lower one, and that when the p1nion41 of the controlling shaft 40 is in looking engagement with the teeth at the recess 26 of the upper roller D, said roller D is compelled to turn when the controlling shaft is turned; but when the controlling shaft 40 is drawn out from said recess and revolved its pinion 41 turns the transmitting shaft 53 s i through the medium of the pinion 54, and

ed to both of the spacing shafts, thus causing motion is thereupon simultaneously impartthe reels to'turn and wind up or unwind the tapes 36 to regulate the width of the ex- --posure opening 24, and'while such operation is being carriedout the roller D remains stationary. 1

In the construction of the upper roller D illustrated inFig. 6, two reels 56 and 56 are mounted toturn in the frame A. The righthand reel 56 is provided with a tubular hub extension 57 which is journaled in the righthand side member 12 of the frame, and at the outer end of this extension a pinion 58 is formed, adapted to mesh with an indicating wheel such as is shown in Fig. 1. The lefthand reel 56 is tubularthroughout and receives the inner end of. a tubular shaft 59 journaled in the left-hand side member 12 of the frame, and this shaft carries at its outer end a ratchet wheel 60 corresponding to the ratchet wheel 50 in Fig. 1. The tubular shaft 59 is secured to a block 61 which constitutesthe left-handfixed head for the roller D; and each of the reels at its inner end is provided-wlth an annular chamber 62, and

the said chambers of the reels are provided with pinion teeth 63, 'as is shown in Fig. 7. A short tubular shaft 64 is loosely mounted in the chamber of the right-hand reel 56, and this shaft forms a portion of or is attached to the rightehand head block 65 for the said roller. 4

Where the shafts 59 and 64 enter the toothed portions of the chambers in the inner faces of said reels, the upper portions of the said shafts are cut away to expose the said teeth, forming thereby sections 66', shown best in Fig. 7, and in these segmental sections of the shafts 59 and 64 teeth 67 are produced, as is also best shown in Fig. 7. A shaft 68 is passed loosely through the head portions of the roller D and out through the right-hand end of the right-hand reel 56, terminating in a knob 68, and in thc chambered portions of each of said reels 56 and 56" a pinion 69 is socured on the said shaft 68; but said pinions while concentric relatively to the shaft 68 are eccentric relatively to the roller, so that the teeth of the pinions will engage with the up per toothed portions of said reels, leaving a space between the lower portions of the said pinions and the extending portions of the shafts 59 and 64.

The shaft 68 has end movement in its bearings, and within the roller D a collar 71 is se- 'cured on the shaft near its right-hand end,

and a spring 72 is coiled around the said shaft, having bearing against the said collar and against the right-hand head of the roller.

Normally the spring 72 will hold the shaft in such position that its pinions will be in engagement with the teeth 67 on said shafts 59 and 64, thus locking the. pinions to the said shaft, and at the same time the teeth of the pinions will be in engagement with the teeth of the said reels. Consequently, upon turning thes'haft 68 the reels and the roller will turn together to wind up the curtain.

When it is desired to make an adjustment of the curtain, the shaft 68 is drawn outward at its right-hand end as shown in Fig. 6, thus carrying the pinions 69 out from engagement with the teeth on the shafts 59 and 64 around which the reels turn; and upon turning the shaft 68 at -such time the reels will be revolved but the roller will remain stationary.

In the construction of the roller D shown in Fig. 8, two reels 73 are provided, the inner end ortions of each of the reels constituting head: for the roller D and these head portions of the reelshave eripheral grooves 74 produced therein, whic receive pins 75 extending from the roller, so that the heads are loosely mounted'in the roller, and preferably nearer the right-hand than the left-hand endof the roller D anapertured block 76 is secured to the roller, normally engaged bya clutch collar 76.

Each of the reels73 is provided with a longitudinal slot 77, and a tubular shaft 78 is assed loosely throu h the said reels, and oosely through the collar 76' is secured to this shaft 78. The, shaft 78 extends out beyond the right-hand side of the frameand is provided with a suitable knob 78 and carries a pinion 79 for engagementwith an indicating wheel 80. Pins lock 76. The clutch 81 extend from the shaft 78 out through the slots 7] in the said reels, so that the shaft ma have. end movement in the reels but the rec s are-compelled to turn with the shaft.

A small shaft 82, which may be termedfa lockin shaft, is made to pass looselythrough the tu ular shaft 78 the greater portion of its length, and at the left-hand end of this shaft 82, which extends beyond the left-hand side of the frame a ratchet wheel 83 is secured, enga ed by a pawl 84 for the purpose of holding t e curtain in the position to which it may have been wound. The tubular shaft 78 is provided with an interior longitudinal l winding roll, a gear controlled shutter adjust- 45 slot 85 at its inner side and an annular slot 86 at one end of the lon itudinal slot 85; and a for winding purposes. .adjustment of the curtain is to be provided pin 87 extends from t eshaft 82, having sliding movement in the slot 85 and being adapted at times to enter the slot 86. A spring 87" is coiled around the tubular shaft 78, having bearing a ainst the clutch collar 76 carried by the s aft 78, and against the righthand head of the said roller. In the operation of this form of the roller the spring 87 tends to hold the shaft 78 in such position that the pin 87 from the shaft 82 will be in the longitudinal slot 85 in said shaft 78, as is illustrated, and the clutch collar 7 6 will be in engagement with the block 76 secured to the roller D Thus when the shaft 78 is turned the roller and the reels turn together When, however, an

for, the shaft 78 is drawn outward at its rightehand end, which will disconnect theclutch collar 76 from the roller block 76 and will bring the pin 87 in the annular groove 86, thus permitting the reels to be turned without interfering with the ratchet and, pawl mechanism and without turning the roller; and in order to make it certain that the roller shall notturn at such time ear teeth 88 are formed at the left-hand en of the said roller, and a bell crank lever 89 is fulcrumed within the frame adjacent to the said teeth, which bell crank lever is exteriorly operated throu h the medium of a spring-controlledpush utton 90, so that while the shaft is eld out by one hand the operator will push the button 90 inward and thereby bring the elbow lever in engagement with the teeth on the roller, effectually holding the latter against turning. I Y

Having thus described my invention, I claim as new, and desire to secure by Letters Patent,

1. In a photographic curtain shutter, a

ing mechanism contained in the winding roll,- an exteriorly' operated operating device common to both the roll and the gear-controlled adjusting mechanism, and means for directly connecting the roll with said gear adjusting mechanism and for disconnecting it therefrom.-

2. In a hotographic curtain shutter, a winding rol spacing shafts mounted to turn in said roll, a transmission shaft also mounted in,the roll, reels upon the spacing shafts, gear connections between the transmission shaft and the spacing shafts, a' controlling shaft mounted for rotary and sliding movement in the roll and adapted to be exteriorly operated, means for'driving the transmissionshaft from the controlling shaft, and means 0 erated by thecontrollin shaft for locking t e same and the spacing shafts to the roll.

3, In a photographic curtain shutter, a frame, a tension roller mounted in the frame,

a winding roller, curtainadjusting shafts' and gears carried by the winding roller, a controlling shaft in ear connection with the winding roller an theadjusting shafts and gears, means controlled by the-controlling shaft for operating the adjusting mechanism independently "of the winding roller, or for operatin the said adjusting mechanism and the win ing rollerin unison, and a curtain, one section of which curtain is connected with the tension roller and the, other section with the winding roller, and ta e connections between the two sections of t e curtain and the said reels.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD LANDER HALL.

' Witnesses:

J. FRED. ACKER, JNo. M. RITTER. 

